Briks is on hiatus now, doing other cool things to keep the Internet a free, and open resource for everyone. If you are looking for browser customisations, I recommend anyone else on this list [wiki.mozilla.org]. — Brian King

Mobile

Extending the Open Web

Briks writes add-ons for browsers, email clients, and other Web-aware
applications. We help companies that invest in Mozilla technologies and firmly believe that they not only have a place on the current Web,
but in the future as the Web evolves. Briks believes in Developing The Future.

Mozilla is the organisation behind Firefox, the hugely popular Web Browser.
Mozilla is also a global community of people that believe that openness, innovation, and opportunity are the cornerstones of the Web and
work towards promoting those principles.

Backed by the latest Web APIs, HTML5 features, and thousands of XPCOM API interfaces,
Mozilla has a wealth of functionality available out-of-the-box. Make the extensible XUL Toolkit work for you to create dynamic user interfaces.